Summary of Operations and Significant Accounting Policies (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary Of Operations And Significant Accounting Policies [Line Items]
Product returns and other allowances	$ 132,900,000	$ 113,500,000	$ 85,800,000
Allowance for doubtful accounts	2,100,000	2,700,000
Impairment of goodwill	0	0
Impairment of long-lived assets	0
Shipping, Handling and Transportation Costs	$ 14,200,000	$ 8,300,000	$ 10,800,000
Options and share grants outstanding	1.4	1.4	2.0
Foreign exchange transaction gains	$ 2,200,000	$ 1,300,000	$ 1,800,000
Accumulated other comprehensive loss	112,666,000	84,416,000	$ 68,400,000
Reduction in other assets and long term notes payable, net of current portion, due to retrospective adoption of ASU 2015-03		2,200,000
Deferred tax assets, unrecognized tax benefit	13,600,000	$ 5,600,000
ASU No. 2016-09
Summary Of Operations And Significant Accounting Policies [Line Items]
Deferred tax assets, unrecognized tax benefit	13,600,000
Deferred tax assets recognized	$ 13,600,000
Restricted Stock
Summary Of Operations And Significant Accounting Policies [Line Items]
Requisite service period	4 years
Minimum | Building
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives	20 years
Minimum | Machinery and Equipment
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Minimum | Leaseholds and Leasehold Improvements
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Maximum | Building
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives	55 years
Maximum | Machinery and Equipment
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives	10 years
Maximum | Leaseholds and Leasehold Improvements
Summary Of Operations And Significant Accounting Policies [Line Items]
Estimated useful lives	5 years